• Update Unicode version 15.1.0
• NEW API: ONIG_OPTION_MATCH_WHOLE_STRING
• Fixed: (?I) option was not enabled for character classes (Issue #264).
• Changed specification to check for incorrect POSIX bracket (Issue #253).
• Changed [[:punct:]] in Unicode encodings to be compatible with POSIX definition. (Issue #268)
• Fixed: ONIG_OPTION_FIND_LONGEST behavior